CVE-2026-73489

{
  "id": "CVE-2026-73489",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-13T22:17:26.893",
  "lastModified": "2026-10-24T15:10:00.190",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Russh is a Rust SSH client & server library. Prior to 0.62.4, an authenticated SSH client can cause a denial of service by sending a pty-req channel request with more than 130 terminal-mode records. The parser in russh/src/server/encrypted.rs stores terminal modes in a fixed 130-entry [(Pty::TTY_OP_END, 0); 130] array but continues increasing the mode count, then constructs an out-of-bounds slice and panics before the application pty_request handler runs. The panic terminates the server session task without causing memory corruption. This issue is fixed in version 0.62.4."
    },
    {
      "lang": "es",
      "value": "Russh es una biblioteca de cliente y servidor SSH de Rust. Antes de la versión 0.62.4, un cliente SSH autenticado puede causar una denegación de servicio al enviar una solicitud de canal pty-req con más de 130 registros de modo de terminal. El analizador en russh/src/server/encrypted.rs almacena los modos de terminal en un array fijo de 130 entradas [(Pty::TTY_OP_END, 0); 130] pero continúa aumentando el recuento de modos, luego construye un slice fuera de límites y entra en pánico antes de que se ejecute el gestor de solicitud pty_request de la aplicación. El pánico termina la tarea de sesión del servidor sin causar corrupción de memoria. Este problema está solucionado en la versión 0.62.4."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Eugeny",
          "product": "russh",
          "versions": [
            {
              "version": "< 0.62.4",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-17T19:50:25.618015Z",
          "id": "CVE-2026-73489",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-129"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/Eugeny/russh/commit/8912512371820167a12a0a638bd666856ce458ad",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Eugeny/russh/releases/tag/v0.62.4",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Eugeny/russh/security/advisories/GHSA-cqjc-rmpq-xprq",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Eugeny/russh/security/advisories/GHSA-cqjc-rmpq-xprq",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}